But other phenomena that look like diseases are known to be maintained by natural selection.
"The constitutional rules of the game need to be maintained even in difficult times, " he said.
She said progress had to be maintained if the 15% target was to be met.
And social networking friendships demand a huge amount of work if they are to be maintained.
Once that reputation was acquired, it had to be maintained, losing face was not an option.
About 15 percent of the portfolio is cut completely, leaving less code that has to be maintained.
Seventy percent is a pretty dominant position, and that's unlikely to be maintained as the pond increases.
What fees or other considerations do you receive from managers who wish to be maintained on your database?
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Charles Kennedy, MP for Ross, Skye and Lochaber, congratulated campaigners who pushed for a service to be maintained.
Poland is among the new member states which want current regional funding levels to be maintained or increased.
Sports Minister Hugh Robertson said momentum needed to be maintained if the commitment to "inspire a generation" was to be achieved.
This not only reduces demand, but also allows government budgets to be maintained.
These population levels had to be maintained for at least five consecutive years.
If this case is to be maintained, that comparison will surely be tested.
And I also believe that consumer spending is going to be very hard to be maintained at these present levels.
The industry may have its ups and downs, but things will always be built, things will always need to be maintained.
And, usually, the equilibrium of only one party has to be maintained.
For any community to thrive and grow and maintain its integrity, rules need to be enforced and best practices need to be maintained.
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The objective of the SGP was for strict fiscal discipline to be maintained and enforced in the process of European Monetary Union (EMU).
Several big banks have already responded by charging customers monthly account fees or asking for minimum balances to be maintained on their accounts.
Also the sand blows in on the roads and that has to be cleared off and the sea wall has to be maintained.
Everything is designed to be maintained and repaired by locals: if a lamp fails it is replaced with another one while being repaired.
"In a building of this size, there's a lot that has to be maintained, and a lot that has to be fixed, " Welch said.
Welsh politicians from all parties have campaigned for its budget to be maintained but cuts of a quarter or more of its grant seem inevitable.
He speculates that Woods drifted away from Harmon as a coach because Harmon believed Woods's game was so good it only needed to be maintained.
"The fact it's going to be maintained and expanded will be good news for people in the surrounding area, " said Vale of Glamorgan council leader Gordon Kemp.
The proposals include a scheme to dredge the town's harbour - something seen as crucial if the sea-link to the Isles of Scilly is to be maintained.
Yet if national cohesion is to be maintained, Indonesia one day will have to go some way toward defusing the resentments of those regions that feel neglected.
Trying to help colleagues at LSUHSC who have NIH grants and need to remain competitive for the research enterprise to be maintained in NO for the long term.
Investment has picked up despite the strengthening of the yen over the past several years, but capital expenditure is unlikely to be maintained unless the yen begins to weaken.
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